IF we sign Osvaldo:
Am I alone in thinking Lambert won't be as effective behind a striker? From a technical point of view, he certainly has the passing vision and range to play there, however:
1. The role requires an ability to find space in between the midfield and defence through clever movement. I don't think he has the pace or agility to do this as well as Lallana and Ramirez can.
2. This role also requires an ability to run into this space at players, often taking them on, something Rickie won't be comfortable doing.
3. Pochettino's 4-2-3-1 requires the wide players to support, and often run past the lone striker. They provide the main attacking support, so that when we aren't a 4-2-3-1, we're more often a 4-3-3 than a 4-4-2. With this in mind, we'd probably see less of Rickie in the box where he's most effective, whether that means providing knock downs, or scoring.
4. MP will want him to press more if he's in that role (Think about how well Gaston and Davis did it), and as fit at he's looking right now, we all know that ain't Rickie's bag.
I'm struggling to think of a player in the modern game with Lambert's physical attributes, who can and does play behind a striker. If Osvaldo signs it'll be intriguing to see how MP handles it.